Patient will present as → a 57-year-old male with a history of hypertension who complains of an acute onset of intermittent headaches and blurred vision of the right eye.
Papilledema is swelling of the optic disk secondary to increased intracranial pressure → classically bilateral but (as in the video example) may be unilateral
- Optic disk swelling resulting from causes that do not involve increased intracranial pressure (eg, malignant hypertension, thrombosis of the central retinal vein) is not considered papilledema.
- There are no early symptoms, although vision may be disturbed for a few seconds. Papilledema requires an immediate search for the cause
Diagnosis is by ophthalmoscopy with further tests, usually brain imaging and sometimes subsequent lumbar puncture, to determine the cause
- MRI or CT scan of the head looking for a cause. Focus on finding intracranial pathology = tumor or bleed, cerebral edema, CSF outflow obstruction or overproduction
- Increased opening pressure with lumbar puncture confirms increased intracranial pressure
Causes include the following:
- Brain tumor or abscess
- Cerebral trauma or hemorrhage
- Meningitis
- Arachnoidal adhesions
- Cavernous or dural sinus thrombosis
- Encephalitis
- Idiopathic intracranial hypertension (pseudotumor cerebri), a condition with elevated CSF pressure and no mass lesion
Urgent treatment of the underlying disorder is indicated to decrease intracranial pressure.
- If intracranial pressure is not reduced, secondary optic nerve atrophy and vision loss eventually occur, along with other serious neurologic sequelae.
Question 1 |
A 19-year-old woman presents to the emergency department complaining of headache. The headaches are generalized and increasing in intensity. They have not responded to over-the-counter (OTC) medications. She complains of approximately 1 week of blurred vision, intermittent diplopia, and vague dizziness. Her medical history includes obesity and acne. She takes Accutane and oral contraceptives. She is found to have bilateral papilledema, visual acuity of 20/30 on physical examination, and a normal MRI of the brain. The next most appropriate step would be
CT scan of the head Hint: See B for explanation | |
lumbar puncture | |
therapy with high-dose prednisone Hint: See B for explanation | |
stat cerebral arteriogram Hint: See B for explanation | |
reassurance and follow-up in the office in 6 months Hint: See B for explanation |
Question 1 Explanation:
The presence of headache associated with papilledema raises the concern for a brain tumor. The MRI excluded a mass lesion, raising a strong suspicion of pseudotumor cerebri. This is also known as benign intracranial hypertension. It is not a benign condition, however, since it causes severe headache and may result in visual loss. It is particularly frequent in obese adolescent girls and young women. The etiology is unknown but may be associated with the use of oral contraceptives, vitamin A, and tetracycline. The presentation consists of headaches caused by an increase in intracranial pressure and blurring of vision. There may be diplopia, but the remainder of the neurologic examination is unremarkable. Papilledema is virtually always part of the presentation. The mental status is normal. The differential diagnosis includes venous sinus thrombosis, sarcoidosis, and tuberculosis or carcinomatous meningitis. The last two are excluded by lumbar puncture. An abnormal cerebrospinal fluid is not consistent with pseudotumor cerebri. The diagnosis is made by excluding mass lesions with CT scan or MRI and demonstrating markedly increased intracranial pressure by lumbar puncture. The treatment involves weight loss, diuretics, and steroids. Repeat lumbar punctures to remove cerebrospinal fluid and decrease intracranial pressure are effective. In cases that are unresponsive to these measures, lumbar-peritoneal shunting is effective, as is unilateral optic nerve sheath fenestration. Effective treatment can improve headaches and prevent vision loss.
There is 1 question to complete.
